United Kingdom, Jan. 6 -- Mandy Moore feels a "certain sadness" about never being pregnant again.

The 41-year-old singer-and-actress - who has Gus, four, Ozzie, three, and 16-month-old Lou with husband Taylor Goldsmith - is "endlessly grateful" to have a "beautiful family" but a part of her laments the fact she has no plans to have another baby in the future.

She wrote on her Instagram Story: "I'm at the OBGYN getting a checkup... I'm endlessly grateful for my beautiful family AND there's a certain sadness knowing I'm done having babies and won't be pregnant again.

"Any other moms feel this way?"

The This Is Us actress previously spoke of her unease at being treated as an "anomaly" when she got pregnant at 40 and was medically-branded...